What is the characteristics of physical …

Physical change: Those changes in which no new substances are formed are called physical changes. But the properties like state, size, shape and colour changes. If we cut the piece of paper in four parts and again we cut the paper into another four pieces, we cannot join the pieces but the properties are changed.

Chemical Change: Those changes in which new substances are formed are called chemical changes. The properties of new substances formed in a chemical changes are entirely different from those of the original substances. Chemical changes are also called as chemical reactions. The chemical changes are permanent changes which can usually not be reversed to form the original substance. Large amount of energy is absorbed or lost during the process.

The characteristics of chemical changes are as follows:

1. One or more new substances are formed in a chemical change.
2. A chemical change is a permanent change.
3. Sound may be produced in a chemical change.
4. A permanent change in colour may take place.
5. A gas may be formed during the chemical change.